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NEETChemistryIonic Equilibrium

Two sparingly soluble salts, MX and MX ₃ , have the same molar solubility s in water at a given temperature. The ratio of their solubility products, K_ sp ( MX ) : K_ sp ( MX ₃) , is

Options

  1. A1 : 27s^2
  2. B1 : 4s
  3. C27s^2 : 1
  4. D1 : 3s^2

Correct answer

A. 1 : 27s^2

Step-by-step solution

For the salt MX : MX M ^+ + X ^- K_ sp ( MX ) = (s)(s) = s^2 For the salt MX ₃ : MX ₃ M ³⁺ + 3 X ^- K_ sp ( MX ₃) = (s)(3s)^3 = 27s^4 The ratio of their solubility products is: K_ sp ( MX ) K_ sp ( MX ₃) = s^2 27s^4 = 1 27s^2 Thus, the ratio is 1 : 27s^2 . Answer: 1 : 27s^2

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